مَرَرْتُ بِأَحْمَدِكُمْ
مَرَرْتُ: past verb with attached first-person subject. بِ: preposition. أَحْمَدِ: genitive noun with a visible kasrah, functioning as muḍāf. كُمْ: attached pronoun in the genitive position of muḍāf ilayh.
The construction restores kasrah in the genitive even though Aḥmad normally behaves as a diptote name.
Opening interactive controls...
Restoring Declension: Indefinite Names, Al- and Iḍāfah
مَرَرْتُ بِأَحْمَدِكُمْ
مَرَرْتُ: past verb with attached first-person subject. بِ: preposition. أَحْمَدِ: genitive noun with a visible kasrah, functioning as muḍāf. كُمْ: attached pronoun in the genitive position of muḍāf ilayh.
The construction restores kasrah in the genitive even though Aḥmad normally behaves as a diptote name.